CN106979181B - The energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power - Google Patents
The energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power Download PDFInfo
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- CN106979181B CN106979181B CN201710338471.7A CN201710338471A CN106979181B CN 106979181 B CN106979181 B CN 106979181B CN 201710338471 A CN201710338471 A CN 201710338471A CN 106979181 B CN106979181 B CN 106979181B
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- rodless cavity
- rod chamber
- cylinder barrel
- rod
- cylinder
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/021—Installations or systems with accumulators used for damping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1471—Guiding means other than in the end cap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/202—Externally-operated valves mounted in or on the actuator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/28—Means for indicating the position, e.g. end of stroke
- F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Servomotors (AREA)
Abstract
A kind of highly integrated hydraulic servo oil cylinder with buffering and overload protection function; including cylinder barrel; piston rod is provided in cylinder barrel; the inner cavity of cylinder barrel is divided into rod chamber and rodless cavity by piston rod; the rod chamber end electrohydraulic servo valve connected with rod chamber and rod chamber end accumulator and the rodless cavity end electrohydraulic servo valve connected with rodless cavity and rodless cavity end accumulator on cylinder barrel are installed, inlet and outlet valve plate is provided on cylinder barrel.Above-mentioned hydraulic servo oil cylinder is suitable for the occasion of cylinder rod chamber and rodless cavity all as effective working chamber.It is without damage with buffering, vibration-absorbing function, can effectively protect cylinder seal part, electrohydraulic servo valve, pull pressure sensor and start object etc. during the cylinder efficient；Servo-cylinder can effectively be adjusted into outflow, hydraulic fluid port inside and outside differential pressure is reduced, there is higher energy valid value；Making dynamic stiffness can also be adjusted in real time, so as to match controlled load rapidly, make it have good dynamic property, can reach accurate power control.
Description
Technical field
The present invention relates to a kind of hydraulic servo oil cylinder, in addition to good bidirectional buffering and high frequency servo actuator function,
The addition of double servo valves and double accumulators also makes it have accurate power control performance and higher energy efficiency, belongs to hydraulic servo
Drive technology field.
Background technology
Hydraulic servo oil cylinder has the characteristics that thrust is big, light weight, integrated level are high, dynamic response is fast, control accuracy is high,
It is used widely in the fields such as engineering machinery, metallurgical machinery, ship, aerospace, robot.But existing hydraulic servo oil cylinder production
In product, without elastic buffer and over-voltage protecting function or only in accumulator of the single-chamber setting with Microspring effect, it is used for
Eliminate the compression shock of single-chamber.The muscle tendon of analogy animal, it is superior stretching and shrinkage for energy storage and
Passive dissipate of impact force is all played the role of sizable, and hydraulic oil is almost a kind of medium of Incoercibility, impact
Property acting process dissipate a large amount of energy, and it is huge to be easy to cause internal pressure momentary variation, and electro-hydraulic watched for symmetrical
Valve control asymmetrical cylinder is taken, rod chamber and rodless cavity fluid are different into and out of amount, this certainly will will also result in excessively high
Energy loss.Therefore, in general, due to lacking comprehensively and effectively pressure peak elastic buffer and constantly flow control, acting
Hydraulic servo oil cylinder sealing element, electrohydraulic servo valve, sensor or start pair are easily caused under the operating mode that frequency is high, jerk is big
As different degrees of damage or the working life for greatly shortening them, on the other hand also reduce system makees efficiency of movement.
Existing servo-cylinder has a bar and rodless cavity flow using single servo valve control mostly, and existing servo valve or
It is proportioning valve, bandwidth is all relatively low, and a kind of variation rigidity effect of stabilization is unable to maintain that in control, causes using it as driving source
Sufficient formula or other motion platforms can not thoroughly be eliminated with the larger impact force that interacts generated during extraneous reciprocation, make simultaneously
Dynamic process shows as a kind of " rigid impact process ", and power control accuracy is poor.
Invention content
The present invention is directed to deficiency of the existing hydraulic servo oil cylinder in absorption impact, start efficiency, power control accuracy etc.,
A kind of energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power is provided.
The energy-efficient hydraulic servo-cylinder with bidirectional buffering and the control of accurate power of the present invention, employs following technical sides
Case：
The hydraulic servo oil cylinder including cylinder barrel, is provided with piston rod in cylinder barrel, the inner cavity of cylinder barrel has been divided into bar by piston rod
Chamber and rodless cavity, be equipped on cylinder barrel the rod chamber end electrohydraulic servo valve connected with rod chamber and rod chamber end accumulator and with
The rodless cavity end electrohydraulic servo valve and rodless cavity end accumulator of rodless cavity connection, are provided with inlet and outlet valve plate, rodless cavity on cylinder barrel
The high pressure hydraulic fluid port of end electrohydraulic servo valve and rod chamber end electrohydraulic servo valve is connected with importing and exporting the high-pressure channel of valve plate, rodless cavity end
The low pressure hydraulic fluid port of electrohydraulic servo valve and rod chamber end electrohydraulic servo valve is connected with importing and exporting the low-pressure channel of valve plate.
The piston rod is mounted on by front end housing in cylinder barrel, and end cap end guiding is provided between piston rod and front end housing
Ring, the one end of piston rod in cylinder barrel are provided with piston end guide ring, and the other end stretches out cylinder barrel and is connected with oscillating bearing.
The cylinder barrel is provided with pull pressure sensor in one end of rodless cavity.
The displacement sensor of detection piston rod displacement is provided on the cylinder barrel.
The rod chamber repairing channel connected with rod chamber and the rodless cavity connected with rodless cavity are provided in the cylinder barrel
Repairing check valve is respectively provided in repairing channel, rod chamber repairing channel and rodless cavity repairing channel.The rod chamber repairing channel
It is connected with rodless cavity repairing channel with importing and exporting the low-pressure channel of valve plate.
Above-mentioned hydraulic servo oil cylinder is suitable for the occasion of cylinder rod chamber and rodless cavity all as effective working chamber.Work as piston
When bar is compressive load, hydraulic oil compression increased pressure in oil cylinder rodless cavity, part fluid enters inside accumulator, and compression is internal
Air bag so as to play passive cushioning effect, by adjusting the blowing pressure in accumulator, can be adjusted effectively into accumulator
Fluid amount, so as to adjust the degree passively buffered.The additional displacement of piston increases the volume of rod chamber, needed for this partial volume
The fluid wanted passes through the repairing check valve being connected with rod chamber end to provide by low pressure oil revolving end fluid.Surge pressure is inhaled
It receives, it is without damage to be effectively protected cylinder seal part, electrohydraulic servo valve, pull pressure sensor and start object etc..
When piston end is tension load, pressure oil compression increased pressure in cylinder rod chamber, similary part fluid enters storage
Inside energy device, inner balloon is compressed, so as to play passive cushioning effect, by adjusting the blowing pressure in accumulator, Ke Yiyou
Effect adjusts the fluid amount into accumulator, so as to adjust the degree passively buffered.The additional displacement of piston increases piston without bar
The volume of chamber, the required fluid of this partial volume are unidirectional by the repairing being connected with rodless cavity end by low pressure oil revolving end fluid
Valve provides.Surge pressure is absorbed, and is effectively protected cylinder seal part, electrohydraulic servo valve, pull pressure sensor and start pair
As etc. it is without damage.
Rod chamber and the electrohydraulic servo valve at rodless cavity both ends are by the flow of two chamber of servo, in addition the effect of accumulator,
Effect can be intended, than spring-mass block in pairs, cylinder body overall performance being made to go out good variable stiffness and elastic property, so as to improve
The load matched followability and flexibility of servo hydraulic cylinder.By the way that the output signal of displacement sensor and pull pressure sensor is drawn
Enter in control system the Close loop servo control, it can be achieved that hydraulic servo oil cylinder displacement and power output.
The invention has the characteristics that：
1. rod chamber and rodless cavity the end accumulator equipped with absorption pressure peak value simultaneously, when work, has buffering, shock-absorbing work(
Can, can effectively protect cylinder seal part, electrohydraulic servo valve, pull pressure sensor and start object etc. are without damage；
2. since rod chamber and rodless cavity end are simultaneously equipped with electrohydraulic servo valve, servo-cylinder disengaging stream can be effectively adjusted
Amount reduces hydraulic fluid port inside and outside differential pressure, has higher energy valid value；
3. since rod chamber and rodless cavity end are simultaneously equipped with electrohydraulic servo valve and accumulator, analogy adds relatively reliable bullet
Property start link, making dynamic stiffness also can constantly be adjusted, and so as to matching controlled load rapidly, make it have good dynamic property,
Accurate power control can be reached.
4. small, light weight, available for the workplace that operating frequency is high, installation space is narrow.
Description of the drawings
Fig. 1 is the external structure signal that the present invention has bidirectional buffering and the energy-efficient hydraulic servo-cylinder of accurate power control
Figure.
Fig. 2 is the external structure schematic diagram of opposite side of the present invention.
Fig. 3 is the longitudinal sectional view of the present invention.
Fig. 4 is partial sectional view at repairing hole in the present invention.
Fig. 5 is the distribution schematic diagram of cylinder barrel upper oil hole in the present invention.
Fig. 6 is the hydraulic schematic diagram of the present invention.
In figure:1. rod chamber end electrohydraulic servo valve, 2. rod chamber end accumulators, 3. fixed seats, 4. cylinder barrels, 5. front end housings,
6. oscillating bearing, 7. anti-torsion rigid support guide rods, 8. anti-torsion rigid support guide sleeves, 9. displacement sensors, 10. valve plates, 11. without bar
Chamber end electrohydraulic servo valve, 12. displacement sensor fixed plates, 13. fixed seat, 14. rodless cavity end accumulator, 15. pressures sensing
Device, 16. oscillating bearings, 17. installation lids, 18. dust-proof seal rings, 19. combination sealings, 20.O type circles, 21. end cap end guide rings,
22. piston rod, 23. piston end guide rings, 24. combination sealing pads, the 25. stifled swollen plugs of oil, 26. rod chamber end repairing check valves, 27.
Rod chamber, 28. rodless cavities, 29. rodless cavity end repairing check valves；
401. rodless cavity accumulation of energys connect oilhole, 402. rodless cavities control connection oilhole, and 403. rodless cavity high pressures connect oilhole,
404. valve plate high pressures connect oilhole, 405. rod chamber low pressure connection oilhole, 406. rod chamber high pressures connection oilhole, 407. rod chambers
Control connection oilhole, 408. rod chamber accumulation of energys connection oilhole, 409. rod chamber low pressure are connected repairing hole, 410. rod chamber ends oil
Hole, 411. valve plate low pressure connection oilhole, 412. rodless cavity end oilholes, 413. rodless cavity low pressure are connected repairing hole, 414. rodless cavities
Low pressure connects oilhole.
Specific embodiment
As shown in Figure 1, Figure 2 and Figure 3, the energy-efficient hydraulic servo oil controlled with bidirectional buffering and accurate power of the invention
Cylinder including cylinder barrel 4, is provided with piston rod 22 in cylinder barrel 4, referring to Fig. 3, piston rod 22 is mounted on by front end housing 5 in cylinder barrel 4,
O-ring 20 is provided between front end housing 5 and cylinder barrel 4, dust-proof seal ring 18 is provided between piston rod 22 and front end housing 5, is combined
Gasket 9 and end cap end guide ring 21.The one end of piston rod 22 in cylinder barrel 4 is provided with piston end guide ring 23 and combination sealing
Pad 24, the other end stretch out cylinder barrel 4 and are connected with oscillating bearing 6.Cylinder barrel 4 is divided into 28 liang of rod chamber 27 and rodless cavity by piston rod 22
Partly (referring to Fig. 6), cylinder barrel 4 is provided with oscillating bearing 16 at rodless cavity end, and tension and compression are provided between cylinder barrel 4 and oscillating bearing 16
Force snesor 15.
It is logical in rod chamber side installation rod chamber end electrohydraulic servo valve 1 and rod chamber end accumulator 2, accumulator 2 on cylinder barrel 4
Fixed seat 3 is crossed on cylinder barrel 4, rod chamber end electrohydraulic servo valve 1 and fixed seat 3 are connected with rod chamber 27, for connecting
Fabrication hole pass through the swollen plug 25 of stifled oil and block.
Rodless cavity end electrohydraulic servo valve 11 and rodless cavity end accumulator 14, accumulation of energy are installed on cylinder barrel 4 in rodless cavity side
Device 14 is mounted on by fixed seat 13 on cylinder barrel 4, rodless cavity end electrohydraulic servo valve 11 and rodless cavity end accumulator 14 with no bar
Chamber 28 connects.The hydraulic fluid port and storage between hydraulic fluid port, accumulator 2 and fixed seat 3 between fixed seat 3 and fixed seat 13 and cylinder barrel 4
Hydraulic fluid port that can be between device 14 and fixed seat 13 is sealed using O-ring.Displacement sensor fixed plate 12 is additionally provided on cylinder barrel 4,
Displacement sensor 9 and anti-torsion rigid support guide rod 7 are installed between displacement sensor fixed plate 12 and front end housing 5, it is anti-to turn round hardness
Anti- torsion rigid support guide sleeve 8 is set in support guide rod 7.
Inlet and outlet valve plate 10 is provided on cylinder barrel 4, to connect extraneous hydraulic power source.Rodless cavity end electrohydraulic servo valve 11 and there is bar
The high pressure hydraulic fluid port of chamber end electrohydraulic servo valve 14 is connected with importing and exporting the high-pressure channel of valve plate 10,11 He of rodless cavity end electrohydraulic servo valve
The low pressure hydraulic fluid port of rod chamber end electrohydraulic servo valve 14 is connected with importing and exporting the low-pressure channel of valve plate 10.
The rod chamber repairing channel connected with rod chamber 27, rod chamber repairing channel are provided in cylinder barrel 4 at rod chamber end
It is interior setting the unidirectional Fill valve 26 (referring to Fig. 3) in rod chamber end, the unidirectional Fill valve 26 in rod chamber end installed by installing lid 17 (referring to
Fig. 2).The repairing channel connected with rodless cavity 28 is provided at rodless cavity end, the unidirectional repairing in rodless cavity end is installed in repairing channel
Valve 29.It is sealed at each connector using O-ring.
According to the component set on cylinder barrel 4, the oilhole with each members is distributed on cylinder barrel 4, as shown in figure 4, packet
Include rodless cavity accumulation of energy connection oilhole 401, rodless cavity control connection oilhole 402, rodless cavity high pressure connection oilhole 403, valve plate high pressure
Connect oilhole 404, rod chamber low pressure connection oilhole 405, rod chamber high pressure connection oilhole 406, rod chamber control connection oilhole
407th, be connected repairing hole 409, rod chamber end of rod chamber accumulation of energy connection oilhole 408, rod chamber low pressure is connected oilhole with rod chamber
410th, the connection of valve plate low pressure oilhole 411, rodless cavity end are connected oilhole 412, rodless cavity low pressure repairing hole 413 and without bar with rod chamber
Chamber low pressure connects oilhole 414.Rodless cavity accumulation of energy connection oilhole 401 is used to connect rodless cavity end accumulator 14.Rodless cavity control connects
Oil-through-hole 402, rodless cavity high pressure connection oilhole 403 connect oilhole 414 with rodless cavity low pressure for connection rodless cavity end electricity respectively
Control port, high-pressure channel and the low-pressure channel of hydraulic servo 11.Rod chamber accumulation of energy connection oilhole 408 is used to connect rod chamber end
Accumulator 2.Rod chamber control connection oilhole 407, rod chamber high pressure connection oilhole 406 connect oilhole 405 with rod chamber low pressure and use
In the control port, high-pressure channel and the low-pressure channel that are connected separately with rod cavity end electrohydraulic servo valve 1.Valve plate high pressure connects oilhole
404 and valve plate low pressure connection oilhole 411 respectively with import and export valve plate 10 high pressure hydraulic fluid port and low pressure hydraulic fluid port connect, as main oil-hole
The extraneous hydraulic power source of connection.Rodless cavity high pressure connection oilhole 403, valve plate high pressure connection oilhole 404 connect oilhole with rod chamber high pressure
406 communicate, and rod chamber low pressure connection oilhole 405, valve plate low pressure connection oilhole 411 connect oilhole 414 with rodless cavity low pressure and communicate.
Be connected repairing hole 409 and rod chamber end oilhole 410 of rod chamber low pressure connects the low-pressure channel for importing and exporting valve plate 10 with rod chamber 27
Logical, rodless cavity end oilhole 412 and rodless cavity low pressure the repairing hole 413 that is connected will import and export the low-pressure channel of valve plate 10 and rodless cavity 28
It is connected, and is embedded in rod chamber repairing end check valve 26 and nothing respectively in rod chamber end oilhole 410 and rodless cavity end oilhole 412
Rod cavity repairing end check valve 29, makes system be only capable of unidirectional repairing.
As shown in fig. 6, rod chamber end electrohydraulic servo valve 1 and rodless cavity end electrohydraulic servo valve 11 analogize to 3-position-3-way electromagnetism
Reversal valve, P, T represent high pressure in-line and low pressure oil return line respectively in figure.When rodless cavity end electrohydraulic servo valve 11 is in right position
When, high pressure oil connects oilhole 404 into rodless cavity end electrohydraulic servo valve 11 by importing and exporting valve plate 10 by valve plate high pressure, passes through
The throttling passage of electro-hydraulic servo valve inner flows into rodless cavity control connection oilhole 402, is further connected by rodless cavity accumulation of energy
Oilhole 401 on the one hand into rodless cavity 28, on the one hand acts on rodless cavity end accumulator 14, compares rodless cavity end accumulator
14 internal inflation pressure come determine its punching, liquid of draining the oil.Pass through electric current of the adjustment effect on rodless cavity end electrohydraulic servo valve 11
Or voltage value, it can be with the amount of opening of adjusting spool, and then adjust the flow and pressure into rodless cavity 28.At this point, control has
Rod cavity end electrohydraulic servo valve 1 should be at left position, and rod chamber 27 is made to be connected with low pressure oil return line T, so as to the high pressure in rodless cavity 28
Fluid pushes piston rod 22 to stretch out, and compresses the volume of rod chamber 27, and internal fluid connects oilhole 408 by rod chamber accumulation of energy
The inside that oilhole 407 enters rod chamber end electrohydraulic servo valve 1 is connected with rod chamber control, and then is connected by rod chamber low pressure
Oilhole 405 connects oilhole 411 with valve plate low pressure and imports and exports the subordinate equipment that valve plate 10 flows into hydraulic system, and piston rod 22 is stretched
It sets out to complete.Pass through electric current or voltage value opening come adjusting spool of the adjustment effect on rod chamber end electrohydraulic servo valve 1
Mouth amount, and then outflow flow and outflow pressure are adjusted, so as to adjust the dynamic stiffness of making of servo hydraulic cylinder, real-time response in real time
The variation of outer load, displacement sensor 8 constantly respond the overhang of piston rod 22, and pull pressure sensor 15 constantly responds servo-fluid
Cylinder pressure is used as power, and the two can be accurately controlled the position output of servo hydraulic cylinder and power output as feedback signal, so as to
Obtain accurate power/position SERVO CONTROL.Due to the control of both-end electrohydraulic servo valve, for asymmetrical cylinder both ends into and out of
Flow can also be reciprocity, effectively reduces rodless cavity end hydraulic fluid port end pressure difference, efficiency of movement is done so as to improve.Both ends are electro-hydraulic
When servo valve is located at reverse of the above position, the retracting action of piston rod 22 is completed, the course of work is similar to the above.
When both ends, electrohydraulic servo valve is all located at middle position, rod chamber 27 and rodless cavity 28 are imported and exported oil circuit and are blocked, at this time
If acting on the load force mutation on piston rod 22, such as load pressure increases suddenly, and the pressure of rodless cavity 28 is caused to increase suddenly,
The pressure of rod chamber 27 drops suddenly, and when pressure is more than the blowing pressure of rodless cavity end accumulator 14, fluid flows into rodless cavity end and stores
In energy device 14,28 internal oil of rodless cavity reaches dynamic equilibrium when equal with rodless cavity end 14 internal gas pressures of accumulator, oil
Liquid is no longer flow into.Piston rod 22 is retracted in this dynamic process, so as to play buffering effect, reduces act pressure peak
Value, protects internal Sensitive Apparatus from the influence of impact.27 volume of rod chamber caused by the retraction of piston rod 22 increases, at this time
Covering fluid is entered by rod chamber end oilhole 410, rod chamber end repairing check valve 26, rod chamber low pressure the repairing hole 409 that is connected
Rod chamber 27 avoids the appearance of cavitation.Dynamic process when piston rod 22 is by tensile load is similar with the former.By changing
Become the volume and the blowing pressure of both ends accumulator, effectively the buffering capacity of regulating piston bar 22 and dynamic elasticity can be made.
Claims (1)
1. a kind of energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power, including cylinder barrel, is provided in cylinder barrel
The inner cavity of cylinder barrel is divided into rod chamber and rodless cavity by piston rod, piston rod, it is characterized in that：It is equipped on cylinder barrel and is connected with rod chamber
Rod chamber end electrohydraulic servo valve and rod chamber end accumulator and the rodless cavity end electrohydraulic servo valve and nothing that are connected with rodless cavity
Rod cavity end accumulator, is provided with inlet and outlet valve plate on cylinder barrel, rodless cavity end electrohydraulic servo valve and rod chamber end electrohydraulic servo valve
High pressure hydraulic fluid port is connected with importing and exporting the high-pressure channel of valve plate, rodless cavity end electrohydraulic servo valve and rod chamber end electrohydraulic servo valve it is low
Press oil port is connected with importing and exporting the low-pressure channel of valve plate；
The piston rod is mounted on by front end housing in cylinder barrel, and end cap end guide ring is provided between piston rod and front end housing, living
The one end of stopper rod in cylinder barrel is provided with piston end guide ring；
The cylinder barrel is provided with pull pressure sensor in one end of rodless cavity；
The displacement sensor of detection piston rod displacement is provided on the cylinder barrel；
The rodless cavity repairing that the rod chamber repairing channel connected with rod chamber is provided in the cylinder barrel and is connected with rodless cavity
Repairing check valve is respectively provided in channel, rod chamber repairing channel and rodless cavity repairing channel；The rod chamber repairing channel and nothing
Rod cavity repairing channel is connected with importing and exporting the low-pressure channel of valve plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710338471.7A CN106979181B (en) | 2017-05-15 | 2017-05-15 | The energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710338471.7A CN106979181B (en) | 2017-05-15 | 2017-05-15 | The energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power |
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| CN106979181B true CN106979181B (en) | 2018-06-08 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478404A (en) * | 2017-09-18 | 2017-12-15 | 诏安县鹏达机械设计部 | A kind of high-speed overload hydraulic impact test device |
| CN109723698B (en) * | 2017-10-27 | 2020-10-23 | 北京精密机电控制设备研究所 | Bidirectional-buffering single-rod symmetrical hydraulic cylinder with emergency function |
| CN108361242A (en) * | 2018-01-29 | 2018-08-03 | 中国第汽车股份有限公司 | Hydraulic cylinder sealing detection device |
| CN109139584A (en) * | 2018-11-05 | 2019-01-04 | 深圳航天科技创新研究院 | Pump valve multiplex control system and method |
| DE102019209679A1 (en) * | 2019-06-27 | 2020-12-31 | Robert Bosch Gmbh | Hydraulic control block and hydraulic axis with the control block |
| CN110259760B (en) * | 2019-07-09 | 2024-06-18 | 北京理工大学珠海学院 | High-frequency rodless coupling power cylinder and use method thereof |
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| DE102012022871A1 (en) * | 2012-11-22 | 2014-05-22 | Hydac System Gmbh | locking device |
| CN206708114U (en) * | 2017-05-15 | 2017-12-05 | 山东大学 | The energy-efficient hydraulic servo-cylinder controlled with bidirectional buffering and accurate power |
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| CN201670154U (en) * | 2010-05-06 | 2010-12-15 | 郑州宇通重工有限公司 | Cushioning device for luffing cylinder of crane jib |
| CN102758812A (en) * | 2012-08-08 | 2012-10-31 | 湖南瑞龙重工科技有限公司 | Buffer device of hydraulic oil cylinder |
| CN103015422A (en) * | 2012-12-19 | 2013-04-03 | 徐州汇通科技开发有限公司 | Hydraulic control system for locking oil cylinder of pile gripper of vibratory pile hammer |
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